US6997618B2 - Bearing housing with divided drainage and oil pooling annulus - Google Patents

Bearing housing with divided drainage and oil pooling annulus Download PDF

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Publication number
US6997618B2
US6997618B2 US10/747,836 US74783603A US6997618B2 US 6997618 B2 US6997618 B2 US 6997618B2 US 74783603 A US74783603 A US 74783603A US 6997618 B2 US6997618 B2 US 6997618B2
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US
United States
Prior art keywords
bearing housing
oil
opening
barrier
annulus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime, expires
Application number
US10/747,836
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English (en)
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US20050141793A1 (en
Inventor
Peter G. Delano
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RTX Corp
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United Technologies Corp
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Assigned to UNITED TECHNOLOGIES CORPORATION reassignment UNITED TECHNOLOGIES CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DELANO, PETER G.
Priority to US10/747,836 priority Critical patent/US6997618B2/en
Application filed by United Technologies Corp filed Critical United Technologies Corp
Assigned to SECRETARY OF THE NAVY reassignment SECRETARY OF THE NAVY CONFIRMATORY LICENSE (SEE DOCUMENT FOR DETAILS). Assignors: UNITED TECHNOLOGIES
Priority to KR1020040085145A priority patent/KR100609363B1/ko
Priority to EP04257609A priority patent/EP1550814B1/de
Priority to DE602004004744T priority patent/DE602004004744T2/de
Priority to JP2004378410A priority patent/JP4050272B2/ja
Priority to CNA2004100941656A priority patent/CN1637307A/zh
Publication of US20050141793A1 publication Critical patent/US20050141793A1/en
Publication of US6997618B2 publication Critical patent/US6997618B2/en
Application granted granted Critical
Assigned to RAYTHEON TECHNOLOGIES CORPORATION reassignment RAYTHEON TECHNOLOGIES CORPORATION CHANGE OF NAME Assignors: UNITED TECHNOLOGIES CORPORATION
Assigned to RAYTHEON TECHNOLOGIES CORPORATION reassignment RAYTHEON TECHNOLOGIES CORPORATION CORRECTIVE ASSIGNMENT TO CORRECT THE AND REMOVE PATENT APPLICATION NUMBER 11886281 AND ADD PATENT APPLICATION NUMBER 14846874. TO CORRECT THE RECEIVING PARTY ADDRESS PREVIOUSLY RECORDED AT REEL: 054062 FRAME: 0001. ASSIGNOR(S) HEREBY CONFIRMS THE CHANGE OF ADDRESS. Assignors: UNITED TECHNOLOGIES CORPORATION
Assigned to RTX CORPORATION reassignment RTX CORPORATION CHANGE OF NAME Assignors: RAYTHEON TECHNOLOGIES CORPORATION
Adjusted expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
    • F16C33/6666—Details of supply of the liquid to the bearing, e.g. passages or nozzles from an oil bath in the bearing housing, e.g. by an oil ring or centrifugal disc
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/18—Lubricating arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/103—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/664—Retaining the liquid in or near the bearing
    • F16C33/6651—Retaining the liquid in or near the bearing in recesses or cavities provided in retainers, races or rolling elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6685—Details of collecting or draining, e.g. returning the liquid to a sump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/042—Guidance of lubricant
    • F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0467—Elements of gearings to be lubricated, cooled or heated
    • F16H57/0469—Bearings or seals

Definitions

  • the present invention relates to a bearing housing, and method for so producing, which allows for both the drainage and the pooling of oil.
  • bearing housings are designed to perform numerous functions including protecting the bearing compartment from the outside environment, supporting a bearing, and providing a means of draining oil away from the bearings and seals to a scavenge pick up.
  • the idea of retaining oil, or maintaining an oil reservoir, is therefore in conflict with the fundamental function of draining oil back to scavenge lines. Without drain back capability whereby oil is drained back to the scavenge lines, the bearing housing compartment can be flooded with oil resulting in operational problems.
  • a bearing housing comprises an annulus having an aft side and a forward side, a barrier extending from the aft side to the forward side to form a first and second zone, a first opening in the first zone extending through the forward side, and a second opening in the second zone extending through the forward side at least a portion of the first opening being at a level lower than a lowermost level of the second opening.
  • a method of draining and pooling oil in an annulus comprises the steps of forming an annulus from an aft side and a forward side, providing a barrier extending from the aft side to the forward side at a height to form a first and second zone, forming a first opening extending through the forward side at least a portion of the first opening located below a fill level, forming a second opening extending through the forward side and located above the fill level, and evacuating oil through the first opening from the first zone and pooling oil in the second zone.
  • FIG. 1A perspective line rendering of the bearing housing of the present invention showing the orientation of the cross section forming FIG. 4 and FIG. 2 .
  • FIG. 2A cross section illustration the bearing housing of the present invention showing the barrier.
  • FIG. 3A perspective line rendering of the bearing housing of the present invention showing the placement of the openings, the barrier, and the water line.
  • FIG. 4A cross section of the bearing housing of the present invention.
  • the aforementioned openings are able to maintain two separate and different levels of oil resulting from the fact that they extend into two separate zones formed on either side of a barrier.
  • the barrier is created during the casting of the bearing housing.
  • the air pipe serves as an exit for high pressure air supplied to the housing bearing so as to affect a tight seal and provide egress for any oil that may overcome the seal.
  • the present invention makes use of the barrier to both drain oil on one side of the barrier to the first opening and reserve oil on the other side of the barrier.
  • oil is pumped into a bearing compartment through oil supply tubes. It is then generally dived into desirable proportions through manifolds, nozzles, or internal passage ways. Some of this oil may be jetted at a target through a nozzle. Often this target is a, bearing, gear, seal, additional passageway, or other structures. In this bearing compartment some oil is directed at a bearing and seal. This bearing and seal is housed by the bearing housing 10 . Of the oil that is directed at the bearing, roughly equal portions of that oil pass through the bearing in the forward and aft directions traveling radially outwards. The oil that has traveled aft of the bearing and radially outwards is collected by the bearing housing 10 .
  • the aggregate of the oil that has traveled aft of the bearing is collected by the bearing housing 10 and drained or collected, according to the principle of the present invention.
  • bearing housing 10 With reference to FIGS. 1 and 3 , there is illustrated the bearing housing 10 of the present invention.
  • Bearing housing 10 is radially disposed about a centerline 15 . Air is pumped into the bearing housing 10 through entrance air pipe 29 and the air exits the bearing housing towards the bottom of the bearing housing 10 through exit air pipe 27 .
  • FIG. 4 there is illustrated in detail a partial cross-section of bearing housing 10 as taken along line 4 — 4 of FIG. 1 .
  • Bearing housing 10 is comprised of an aft side 21 and a forward side 23 forming annulus 22 . In operation, the bearing housing 10 is situated as illustrated in FIG.
  • section 4 — 4 is taken at bottom dead center (BDC) of the bearing housing 10 during operation.
  • exit air pipe 27 is slightly displaced from bottom dead center (BDC).
  • FIG. 2 is a perspective rendering showing a cross-section of bearing housing 10 taken through the centerline of exit air pipe 27 along line 2 — 2 of FIG. 1 .
  • a barrier 25 is formed from air pipe 27 and a blocking element 28 extending from beneath exit air pipe 27 downwards and outwards and into contact with both aft side 21 and forward side 23 .
  • barrier 25 prevents the free movement of oil collecting at the bottom of bearing housing 10 from side-to-side. Because barrier 25 prevents the free movement of oil from one side of barrier 25 to the other side of barrier 25 within annulus 22 , it is possible to fabricate draining holes through forward side 23 from annulus 22 such that oil drains from each side of barrier 25 at a different rate.
  • first opening 11 and second opening 13 used to achieve a differential accumulation/drainage of oil having pooled at the bottom of annulus 22 .
  • Barrier 25 effectively separates annulus 22 into a first side 53 and a second side 55 .
  • Fill level 51 defines the uppermost desirable level of oil such that the amount of oil retained on second side 55 bounded by barrier 25 , aft side 21 , and forward side 23 is of an amount sufficient to meet the retained oil requirements of bearing housing 10 .
  • Second opening 13 is preferably fabricated through forward side 23 into annulus 22 such that the lowest part of second opening 13 is at the same approximate level as water level 51 .
  • Fill level 51 is preferably just below the highest point of barrier 25 .
  • first opening 11 is fabricated through forward side 23 and extending into annulus 22 on first side 53 in as close a proximity as is practicable to barrier 25 .
  • the size of the first opening 11 is selected to provide for oil drainage in accordance with the specified oil drainage requirement of the bearing housing 10 .
  • openings 11 , 13 form slots circumferentially disposed about forward side 23 .
  • oil tends to pool at the bottom of bearing housing 10 and annulus 22 on both sides of barrier 25 at approximately the same rate.
  • first opening 11 is located quite close to BDC and in proximity to the barrier 25 , oil which begins to collect on first side 53 tends to evacuate the bearing housing 10 through first opening 11 .
  • second side 55 of annulus 22 the oil so collecting tends to form a reserve whose level steadily increases until the level of the oil in reserve reaches fill level 51 .
  • any addition of oil to second side 55 results in the evacuation of oil through second opening 13 .

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Sliding-Contact Bearings (AREA)
  • General Details Of Gearings (AREA)
  • Earth Drilling (AREA)
  • Rolling Contact Bearings (AREA)
US10/747,836 2003-12-29 2003-12-29 Bearing housing with divided drainage and oil pooling annulus Expired - Lifetime US6997618B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US10/747,836 US6997618B2 (en) 2003-12-29 2003-12-29 Bearing housing with divided drainage and oil pooling annulus
KR1020040085145A KR100609363B1 (ko) 2003-12-29 2004-10-25 분리된 배출 및 오일 고임 고리부를 구비한 베어링 하우징
EP04257609A EP1550814B1 (de) 2003-12-29 2004-12-08 Lagergehäuse mit einem aufgeteilten Ring für Öl-Drainage und -Sammlung
DE602004004744T DE602004004744T2 (de) 2003-12-29 2004-12-08 Lagergehäuse mit einem aufgeteilten Ring für Öl-Drainage und -Sammlung
JP2004378410A JP4050272B2 (ja) 2003-12-29 2004-12-28 ベアリングハウジングおよび油排出・貯油方法
CNA2004100941656A CN1637307A (zh) 2003-12-29 2004-12-29 带分隔的排油和集油环体的轴承箱

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/747,836 US6997618B2 (en) 2003-12-29 2003-12-29 Bearing housing with divided drainage and oil pooling annulus

Publications (2)

Publication Number Publication Date
US20050141793A1 US20050141793A1 (en) 2005-06-30
US6997618B2 true US6997618B2 (en) 2006-02-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
US10/747,836 Expired - Lifetime US6997618B2 (en) 2003-12-29 2003-12-29 Bearing housing with divided drainage and oil pooling annulus

Country Status (6)

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US (1) US6997618B2 (de)
EP (1) EP1550814B1 (de)
JP (1) JP4050272B2 (de)
KR (1) KR100609363B1 (de)
CN (1) CN1637307A (de)
DE (1) DE602004004744T2 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080190091A1 (en) * 2003-12-17 2008-08-14 Peters Robert E Bifurcated oil scavenging bearing compartment within a gas turbine engine
US20090114480A1 (en) * 2007-11-02 2009-05-07 General Electric Company Oil manifold for lubricating bearings
US20130283756A1 (en) * 2012-04-30 2013-10-31 Stephanie M. Baker Manifold for gas turbine engine
US20160010550A1 (en) * 2013-06-06 2016-01-14 United Technologies Corporation Manifold for gas turbine
US11162421B2 (en) 2019-10-22 2021-11-02 Pratt & Whitney Canada Corp. Bearing cavity and method of evacuating oil therefrom

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8210316B2 (en) * 2006-12-12 2012-07-03 United Technologies Corporation Oil scavenge system for a gas turbine engine
US9476323B2 (en) 2012-05-31 2016-10-25 United Technologies Corporation Turbine gear assembly support having symmetrical removal features
KR101267228B1 (ko) 2013-03-14 2013-05-27 허옥동 송풍기용 일체형 베어링하우징
JP6145028B2 (ja) * 2013-11-08 2017-06-07 住友重機械工業株式会社 減速装置
CN104976236A (zh) * 2015-06-29 2015-10-14 柳州市邕达工配厂 一种轴承套
KR102175892B1 (ko) * 2017-04-10 2020-11-06 가부시키가이샤 하모닉 드라이브 시스템즈 실크햇형 파동기어장치

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1967705A (en) * 1932-02-04 1934-07-24 Wagner Electric Corp Oil reservoir for bearings
US2010896A (en) * 1928-03-21 1935-08-13 Sunbeam Electric Mfg Company System of lubrication
US5001377A (en) * 1990-01-12 1991-03-19 Magnetek, Inc. Lubrication system with inlet and outlet packets
US5560619A (en) * 1995-06-02 1996-10-01 Imagine That Gasket for filling wheel hub with lubricant and method therefor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2229885A1 (en) * 1973-05-15 1974-12-13 Skf Ind Trading & Dev Lube oil system for ball and roller bearing - oil circulates and drains through radial and axial bores through hub
DE69132849T2 (de) * 1990-12-20 2002-06-13 The Pillsbury Co., Minneapolis Temperaturgesteuerte mikrowellensuszeptorstruktur
DE9217575U1 (de) * 1992-12-23 1993-02-18 FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt Vorrichtung zum Entfernen von Öl aus Ringräumen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2010896A (en) * 1928-03-21 1935-08-13 Sunbeam Electric Mfg Company System of lubrication
US1967705A (en) * 1932-02-04 1934-07-24 Wagner Electric Corp Oil reservoir for bearings
US5001377A (en) * 1990-01-12 1991-03-19 Magnetek, Inc. Lubrication system with inlet and outlet packets
US5560619A (en) * 1995-06-02 1996-10-01 Imagine That Gasket for filling wheel hub with lubricant and method therefor

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080190091A1 (en) * 2003-12-17 2008-08-14 Peters Robert E Bifurcated oil scavenging bearing compartment within a gas turbine engine
US7625126B2 (en) * 2003-12-17 2009-12-01 United Technologies Corporation Bifurcated oil scavenging bearing compartment within a gas turbine engine
US20090114480A1 (en) * 2007-11-02 2009-05-07 General Electric Company Oil manifold for lubricating bearings
US7861827B2 (en) * 2007-11-02 2011-01-04 General Electric Company Oil manifold for lubricating bearings
US20130283756A1 (en) * 2012-04-30 2013-10-31 Stephanie M. Baker Manifold for gas turbine engine
US9163717B2 (en) * 2012-04-30 2015-10-20 United Technologies Corporation Multi-piece fluid manifold for gas turbine engine
US20160010550A1 (en) * 2013-06-06 2016-01-14 United Technologies Corporation Manifold for gas turbine
US9957890B2 (en) * 2013-06-06 2018-05-01 United Technologies Corporation Manifold for gas turbine
US11162421B2 (en) 2019-10-22 2021-11-02 Pratt & Whitney Canada Corp. Bearing cavity and method of evacuating oil therefrom

Also Published As

Publication number Publication date
CN1637307A (zh) 2005-07-13
EP1550814A2 (de) 2005-07-06
US20050141793A1 (en) 2005-06-30
KR100609363B1 (ko) 2006-08-09
EP1550814A3 (de) 2006-02-01
JP2005195177A (ja) 2005-07-21
KR20050069874A (ko) 2005-07-05
DE602004004744T2 (de) 2007-06-28
JP4050272B2 (ja) 2008-02-20
DE602004004744D1 (de) 2007-03-29
EP1550814B1 (de) 2007-02-14

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